Sentence Architecture Slides
Grades 7–8 English Language Arts
Syntax Blueprint Series
Sentence Architecture
Mastering the four structural blueprints: Simple, Compound, Complex, and Compound-Complex.
1. Core Anatomy
2. Four Blueprints
3. Guided Analysis
4. Combining Lab
Foundation First
Clauses: The Building Blocks
01 / Anatomy
Independent Clause (I)
A complete thought containing both a subject and a predicate that can stand alone as a sentence.
Example:
"The radar detected an unidentified signal."
Dependent Clause (D)
Contains a subject and predicate, but begins with a subordinating word. It cannot stand alone.
Example:
"Because the radar detected an unidentified signal..."
The Rule of Thumb: Sentence types are determined strictly by how many of each clause you connect and how you connect them!
Blueprint 1
Simple Sentence
Formula: [ 1 Independent Clause ]
Definition & Properties
A simple sentence expresses a single complete thought. It has exactly one independent clause and zero dependent clauses.
Common Trap: Length ≠ Complexity
A simple sentence can have a compound subject ("Mia and Leo") or a compound verb ("ran and jumped"). It is still simple because it shares one clause!
Example Gallery
Standard:
"The solar panels generate clean electricity."
Compound Subject:
"Marcus and Elena mapped the cavern."
Compound Predicate:
"The rover collected samples and transmitted data."
Clause Count: 1 Independent + 0 Dependent
Blueprint 2
Compound Sentence
Formula: [ Indep ] + [ Connector ] + [ Indep ]
Two Equal Partners
Joins two or more independent clauses of equal grammatical weight. Neither clause depends on the other.
The Two Approved Fasteners:
1
Comma + FANBOYS: For, And, Nor, But, Or, Yet, So
2
Semicolon alone (;): Between closely linked clauses
Example Blueprint
Option A: Comma + FANBOYS
"The storm knocked out power, but the backup generator started instantly."
Option B: Semicolon
"The deadline arrived quickly; our team was fully prepared."
Clause Count: 2+ Independent + 0 Dependent
Blueprint 3
Complex Sentence
Formula: [ 1 Indep ] + [ 1+ Dep ]
One Leader, One Supporter
Combines one independent clause with at least one dependent clause introduced by a subordinating conjunction or relative pronoun.
Subordinating Conjunctions:
AAAWWUBBIS: Although, After, As, While, When, Until, Before, Because, If, Since (also: which, who, that).
Order & Comma Rule
Dependent First (Comma Required):
"Although the climb was steep, we reached the summit by noon."
Independent First (Usually No Comma):
"We reached the summit by noon because our team kept a steady pace."
Clause Count: Exactly 1 Independent + 1 or More Dependent
Blueprint 4
Compound-Complex Sentence
Formula: [ 2+ Indep ] + [ 1+ Dep ]
The Master Build
Combines the features of compound and complex sentences: at least two independent clauses joined together, plus at least one dependent clause.
Punctuation Checklist:
- Comma after introductory dependent clause
- Comma + FANBOYS between independent clauses
Architectural Deconstruction
"When the bell rang, Maya packed her backpack, and Julian turned in his lab report."
1. Dependent: "When the bell rang"
2. Independent: "Maya packed her backpack"
3. Independent: "Julian turned in his lab report"
Clause Count: 2+ Independent + 1+ Dependent
Review & Contrast
The Master Blueprint Matrix
02 / Diagnostic
| Sentence Type |
Independent |
Dependent |
Key Connectors |
Core Diagnostic |
| Simple |
1 |
0 |
None required |
One standalone thought |
| Compound |
2 or more |
0 |
, + FANBOYS or ; |
Two equal independent thoughts |
| Complex |
Exactly 1 |
1 or more |
Subordinating (AAAWWUBBIS) |
One independent + dependent clause(s) |
| Compound-Complex |
2 or more |
1 or more |
Both FANBOYS & Subordinator |
2+ independent thoughts + dependent context |
Quick Diagnostic Trick: Always count the independent clauses first. If there are 2, it is Compound or Compound-Complex. If there is only 1, it is Simple or Complex!
Guided Practice
Identify the Blueprint
Classify Each: S, CD, CX, or CD-CX
Sentence A Count the clauses...
"The engineers tested the lunar thrusters and calibrated the navigation sensors."
Sentence B Check conjunctions...
"The submarine reached the ocean trench, but the researchers noticed a pressure leak."
Sentence C Look for subordinators...
"Since the weather radar signaled high winds, we secured the outdoor equipment."
Sentence D How many total parts?
"After the telescope rotated into position, Dr. Chen took photos, and her assistant logged the coordinates."
Turn to your partner: What is the clause blueprint for each sentence? Next Slide: Full Answer Breakdown →
Solution Guide
Identification Breakdown
Answers & Analysis
Sentence A: SIMPLE (S) 1 Indep + 0 Dep
"The engineers tested the thrusters and calibrated the sensors."
Why: One subject ("engineers") with a compound predicate ("tested... and calibrated..."). No second clause!
Sentence B: COMPOUND (CD) 2 Indep + 0 Dep
"[The submarine reached the trench], but [the researchers noticed a leak]."
Why: Two full independent clauses linked with comma + coordinating conjunction (FANBOYS: "but").
Sentence C: COMPLEX (CX) 1 Indep + 1 Dep
"[Since the radar signaled winds], [we secured the equipment]."
Why: Begins with subordinating conjunction ("Since") creating a dependent clause before the main clause.
Sentence D: COMPOUND-COMPLEX (CD-CX) 2 Indep + 1 Dep
"[After the telescope rotated], [Dr. Chen took photos], and [her assistant logged data]."
Why: Contains 1 dependent clause ("After...") plus 2 independent clauses joined by ", and".
Key Takeaway: Look past length—always count subjects and finite verbs per clause!
Hands-On Practice
Sentence Combining Lab
Build with Specific Blueprints
Your Raw Materials (3 Base Sentences):
Sentence 1: "The volcano erupted violently."
Sentence 2: "Ash covered the valley."
Sentence 3: "The villagers evacuated safely."
Mission 1
Build Compound
Combine Sentences 1 and 2 using a coordinating conjunction (FANBOYS) or a semicolon.
[ Indep ] + , FANBOYS + [ Indep ]
Mission 2
Build Complex
Combine Sentences 2 and 3 using a subordinating conjunction (although, because, even though).
[ Dep, ] + [ Indep ]
Mission 3
Build Cpd-Complex
Combine all three sentences into one compound-complex master build!
[ Dep, ] + [ Indep ] + , FANBOYS + [ Indep ]
Draft your combinations on your whiteboard or notes. Next Slide: Model Solutions →
Lab Results
Combining Lab Model Solutions
Structural Proof
Compound Model
"The volcano erupted violently, and ash covered the valley."
Blueprint: Two independent clauses connected by comma + coordinating conjunction "and". (Alternative: semicolon between clauses).
Complex Model
"Even though ash covered the valley, the villagers evacuated safely."
Blueprint: Subordinating conjunction "Even though" creates one dependent clause, followed by a comma and one independent clause.
Cpd-Complex Model
"When the volcano erupted violently, ash covered the valley, but the villagers evacuated safely."
Blueprint: 1 Dependent clause ("When...") + 2 Independent clauses joined by ", but".
Notice the Power: Sentence combining gives your writing variety, rhythm, and clear logic!
Exit Challenge
Rapid-Fire Diagnostic Check
Final Check
1
Spot the Compound
Which sentence is truly Compound?
A. Liam baked cookies and iced them.
B. Liam baked cookies, and Zoe iced them.
Key: B (Two distinct subjects & verbs!)
2
Spot the Subordinator
Which word turns an independent clause into a dependent clause?
And
Although
But
So
Key: "Although" (AAAWWUBBIS)
3
The Master Equation
What is the minimum clause requirement for a Compound-Complex sentence?
2+ Independent Clauses
1+ Dependent Clause
Key: At least 3 clauses total!
You now have the blueprints to build and deconstruct any sentence in English!
Sentence Architecture Certified
